Twin-Screw Compressor Slide Valve With Suction Pulsation Damping
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Solution Overview
Problem
Existing slide valves for twin-screw compressors are ineffective in attenuating air flow pulsations on the suction side, leading to vibrations and noise, and there is a lack of effective pulsation attenuation designs to reduce overall pressure pulsation levels.
Innovation Solution
A slide valve with cavities and passages configured to connect with external fluid, reducing air flow pulsations on the suction side by absorbing energy and buffering air flow, thereby alleviating vibrations and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the slide valve structure is used for load regulation, then the amount of air delivered can be regulated, but air flow pulsations occur causing vibrations and noise
Solution Approach 1:
A pulsation attenuation device is introduced as an intermediary component between the suction cavity and the working cavity. This device includes a pulsation attenuation cavity and multiple pulsation attenuation channels that mediate the air flow, reducing pulsations before they reach the main system while maintaining the slide valve's load regulation function.
Solution Approach 2:
The pulsation attenuation device changes the flow parameters by directing air flow through multiple small channels instead of a single large opening. This parameter change reduces the amplitude of pressure pulsations and air flow fluctuations, thereby reducing vibrations and noise while preserving the ability to regulate air delivery.
2Object-affected harmful factors
If pulsation attenuation design is added to reduce air flow pulsations, then vibrations and noise are alleviated, but device complexity increases
Solution Approach 1:
The slide valve structure is designed to serve multiple functions: it performs load regulation by controlling the opening area and simultaneously acts as a pulsation attenuation device through its cavity and channel structure. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while achieving vibration and noise reduction.
Solution Approach 2:
The pulsation attenuation channels are nested within the slide valve body structure itself. The pulsation attenuation cavity is integrated into the existing valve architecture, allowing the attenuation function to be embedded within the load regulation mechanism rather than adding external components.
3Object-affected harmful factors
If multiple pulsation attenuation channels are provided, then air flow pulsations are reduced, but manufacturing complexity increases
Solution Approach 1:
The pulsation attenuation function is divided into multiple independent channels within the slide valve body. Each channel works independently to reduce pulsations, and this segmentation allows for modular manufacturing and assembly, potentially simplifying the production process compared to creating a single complex attenuation structure.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The proposed slide valve design effectively reduces air flow pulsations, alleviates vibrations and noise, and improves the running reliability of twin-screw compressors without additional attenuation devices or extra pressure loss.
Implementation Method 1
A cavity is formed inside the free end of the slide valve body, and the slide valve has at least one passage configured to fluidly connect the cavity with an external fluid to reduce air flow pulsations on the suction side of the twin-screw compressor
Data Source
AI summary
The present application provides a slide valve, wherein the slide valve is configured to regulate a load of a twin-screw compressor. The slide valve comprises a slide valve body, wherein the slide valve body has a connecting end and a free end, the connecting end is configured to connect to a slide valve connecting rod of the twin-screw compressor, and the slide valve is driven to slide by the slide valve connecting rod. A cavity is formed in the free end of the slide valve body, and the slide valve has a passage configured to fluidly couple the cavity with an external fluid to reduce air flow pulsations on a suction side of the twin-screw compressor and thereby reduce overall air flow pulsations in the twin-screw compressor.